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qemu/hw/i2c/pmbus_device.c
Peter Delevoryas d272d1410c hw/i2c/pmbus: Add idle state to return 0xff's 
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Reviewed-by: Titus Rwantare <titusr@google.com>
Message-Id: <20220701000626.77395-2-me@pjd.dev>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
2022-07-14 16:24:38 +02:00

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/*
* PMBus wrapper over SMBus
*
* Copyright 2021 Google LLC
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include <math.h>
#include <string.h>
#include "hw/i2c/pmbus_device.h"
#include "migration/vmstate.h"
#include "qemu/module.h"
#include "qemu/log.h"
uint16_t pmbus_data2direct_mode(PMBusCoefficients c, uint32_t value)
{
/* R is usually negative to fit large readings into 16 bits */
uint16_t y = (c.m * value + c.b) * pow(10, c.R);
return y;
}
uint32_t pmbus_direct_mode2data(PMBusCoefficients c, uint16_t value)
{
/* X = (Y * 10^-R - b) / m */
uint32_t x = (value / pow(10, c.R) - c.b) / c.m;
return x;
}
uint16_t pmbus_data2linear_mode(uint16_t value, int exp)
{
/* L = D * 2^(-e) */
if (exp < 0) {
return value << (-exp);
}
return value >> exp;
}
uint16_t pmbus_linear_mode2data(uint16_t value, int exp)
{
/* D = L * 2^e */
if (exp < 0) {
return value >> (-exp);
}
return value << exp;
}
void pmbus_send(PMBusDevice *pmdev, const uint8_t *data, uint16_t len)
{
if (pmdev->out_buf_len + len > SMBUS_DATA_MAX_LEN) {
qemu_log_mask(LOG_GUEST_ERROR,
"PMBus device tried to send too much data");
len = 0;
}
for (int i = len - 1; i >= 0; i--) {
pmdev->out_buf[i + pmdev->out_buf_len] = data[len - i - 1];
}
pmdev->out_buf_len += len;
}
/* Internal only, convert unsigned ints to the little endian bus */
static void pmbus_send_uint(PMBusDevice *pmdev, uint64_t data, uint8_t size)
{
uint8_t bytes[8];
g_assert(size <= 8);
for (int i = 0; i < size; i++) {
bytes[i] = data & 0xFF;
data = data >> 8;
}
pmbus_send(pmdev, bytes, size);
}
void pmbus_send8(PMBusDevice *pmdev, uint8_t data)
{
pmbus_send_uint(pmdev, data, 1);
}
void pmbus_send16(PMBusDevice *pmdev, uint16_t data)
{
pmbus_send_uint(pmdev, data, 2);
}
void pmbus_send32(PMBusDevice *pmdev, uint32_t data)
{
pmbus_send_uint(pmdev, data, 4);
}
void pmbus_send64(PMBusDevice *pmdev, uint64_t data)
{
pmbus_send_uint(pmdev, data, 8);
}
void pmbus_send_string(PMBusDevice *pmdev, const char *data)
{
size_t len = strlen(data);
g_assert(len > 0);
g_assert(len + pmdev->out_buf_len < SMBUS_DATA_MAX_LEN);
pmdev->out_buf[len + pmdev->out_buf_len] = len;
for (int i = len - 1; i >= 0; i--) {
pmdev->out_buf[i + pmdev->out_buf_len] = data[len - 1 - i];
}
pmdev->out_buf_len += len + 1;
}
static uint64_t pmbus_receive_uint(PMBusDevice *pmdev)
{
uint64_t ret = 0;
/* Exclude command code from return value */
pmdev->in_buf++;
pmdev->in_buf_len--;
for (int i = pmdev->in_buf_len - 1; i >= 0; i--) {
ret = ret << 8 | pmdev->in_buf[i];
}
return ret;
}
uint8_t pmbus_receive8(PMBusDevice *pmdev)
{
if (pmdev->in_buf_len - 1 != 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: length mismatch. Expected 1 byte, got %d bytes\n",
__func__, pmdev->in_buf_len - 1);
}
return pmbus_receive_uint(pmdev);
}
uint16_t pmbus_receive16(PMBusDevice *pmdev)
{
if (pmdev->in_buf_len - 1 != 2) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: length mismatch. Expected 2 bytes, got %d bytes\n",
__func__, pmdev->in_buf_len - 1);
}
return pmbus_receive_uint(pmdev);
}
uint32_t pmbus_receive32(PMBusDevice *pmdev)
{
if (pmdev->in_buf_len - 1 != 4) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: length mismatch. Expected 4 bytes, got %d bytes\n",
__func__, pmdev->in_buf_len - 1);
}
return pmbus_receive_uint(pmdev);
}
uint64_t pmbus_receive64(PMBusDevice *pmdev)
{
if (pmdev->in_buf_len - 1 != 8) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: length mismatch. Expected 8 bytes, got %d bytes\n",
__func__, pmdev->in_buf_len - 1);
}
return pmbus_receive_uint(pmdev);
}
static uint8_t pmbus_out_buf_pop(PMBusDevice *pmdev)
{
if (pmdev->out_buf_len == 0) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: tried to read from empty buffer",
__func__);
return PMBUS_ERR_BYTE;
}
uint8_t data = pmdev->out_buf[pmdev->out_buf_len - 1];
pmdev->out_buf_len--;
return data;
}
static void pmbus_quick_cmd(SMBusDevice *smd, uint8_t read)
{
PMBusDevice *pmdev = PMBUS_DEVICE(smd);
PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
if (pmdc->quick_cmd) {
pmdc->quick_cmd(pmdev, read);
}
}
static void pmbus_pages_alloc(PMBusDevice *pmdev)
{
/* some PMBus devices don't use the PAGE command, so they get 1 page */
PMBusDeviceClass *k = PMBUS_DEVICE_GET_CLASS(pmdev);
if (k->device_num_pages == 0) {
k->device_num_pages = 1;
}
pmdev->num_pages = k->device_num_pages;
pmdev->pages = g_new0(PMBusPage, k->device_num_pages);
}
void pmbus_check_limits(PMBusDevice *pmdev)
{
for (int i = 0; i < pmdev->num_pages; i++) {
if ((pmdev->pages[i].operation & PB_OP_ON) == 0) {
continue; /* don't check powered off devices */
}
if (pmdev->pages[i].read_vout > pmdev->pages[i].vout_ov_fault_limit) {
pmdev->pages[i].status_word |= PB_STATUS_VOUT;
pmdev->pages[i].status_vout |= PB_STATUS_VOUT_OV_FAULT;
}
if (pmdev->pages[i].read_vout > pmdev->pages[i].vout_ov_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_VOUT;
pmdev->pages[i].status_vout |= PB_STATUS_VOUT_OV_WARN;
}
if (pmdev->pages[i].read_vout < pmdev->pages[i].vout_uv_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_VOUT;
pmdev->pages[i].status_vout |= PB_STATUS_VOUT_UV_WARN;
}
if (pmdev->pages[i].read_vout < pmdev->pages[i].vout_uv_fault_limit) {
pmdev->pages[i].status_word |= PB_STATUS_VOUT;
pmdev->pages[i].status_vout |= PB_STATUS_VOUT_UV_FAULT;
}
if (pmdev->pages[i].read_vin > pmdev->pages[i].vin_ov_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_INPUT;
pmdev->pages[i].status_input |= PB_STATUS_INPUT_VIN_OV_WARN;
}
if (pmdev->pages[i].read_vin < pmdev->pages[i].vin_uv_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_INPUT;
pmdev->pages[i].status_input |= PB_STATUS_INPUT_VIN_UV_WARN;
}
if (pmdev->pages[i].read_iout > pmdev->pages[i].iout_oc_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_IOUT_POUT;
pmdev->pages[i].status_iout |= PB_STATUS_IOUT_OC_WARN;
}
if (pmdev->pages[i].read_iout > pmdev->pages[i].iout_oc_fault_limit) {
pmdev->pages[i].status_word |= PB_STATUS_IOUT_POUT;
pmdev->pages[i].status_iout |= PB_STATUS_IOUT_OC_FAULT;
}
if (pmdev->pages[i].read_pin > pmdev->pages[i].pin_op_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_INPUT;
pmdev->pages[i].status_input |= PB_STATUS_INPUT_PIN_OP_WARN;
}
if (pmdev->pages[i].read_temperature_1
> pmdev->pages[i].ot_fault_limit) {
pmdev->pages[i].status_word |= PB_STATUS_TEMPERATURE;
pmdev->pages[i].status_temperature |= PB_STATUS_OT_FAULT;
}
if (pmdev->pages[i].read_temperature_1
> pmdev->pages[i].ot_warn_limit) {
pmdev->pages[i].status_word |= PB_STATUS_TEMPERATURE;
pmdev->pages[i].status_temperature |= PB_STATUS_OT_WARN;
}
}
}
void pmbus_idle(PMBusDevice *pmdev)
{
pmdev->code = PMBUS_IDLE_STATE;
}
/* assert the status_cml error upon receipt of malformed command */
static void pmbus_cml_error(PMBusDevice *pmdev)
{
for (int i = 0; i < pmdev->num_pages; i++) {
pmdev->pages[i].status_word |= PMBUS_STATUS_CML;
pmdev->pages[i].status_cml |= PB_CML_FAULT_INVALID_CMD;
}
}
static uint8_t pmbus_receive_byte(SMBusDevice *smd)
{
PMBusDevice *pmdev = PMBUS_DEVICE(smd);
PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
uint8_t ret = PMBUS_ERR_BYTE;
uint8_t index;
if (pmdev->out_buf_len != 0) {
ret = pmbus_out_buf_pop(pmdev);
return ret;
}
/*
* Reading from all pages will return the value from page 0,
* means that all subsequent commands are to be applied to all output.
*/
if (pmdev->page == PB_ALL_PAGES) {
index = 0;
} else if (pmdev->page > pmdev->num_pages - 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: page %d is out of range\n",
__func__, pmdev->page);
pmbus_cml_error(pmdev);
return PMBUS_ERR_BYTE;
} else {
index = pmdev->page;
}
switch (pmdev->code) {
case PMBUS_PAGE:
pmbus_send8(pmdev, pmdev->page);
break;
case PMBUS_OPERATION: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].operation);
break;
case PMBUS_ON_OFF_CONFIG: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].on_off_config);
break;
case PMBUS_PHASE: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].phase);
break;
case PMBUS_WRITE_PROTECT: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].write_protect);
break;
case PMBUS_CAPABILITY:
pmbus_send8(pmdev, pmdev->capability);
if (pmdev->capability & BIT(7)) {
qemu_log_mask(LOG_UNIMP,
"%s: PEC is enabled but not yet supported.\n",
__func__);
}
break;
case PMBUS_VOUT_MODE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MODE) {
pmbus_send8(pmdev, pmdev->pages[index].vout_mode);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_COMMAND: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_command);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_TRIM: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_trim);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_CAL_OFFSET: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_cal_offset);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_MAX: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_max);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_MARGIN_HIGH: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) {
pmbus_send16(pmdev, pmdev->pages[index].vout_margin_high);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_MARGIN_LOW: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) {
pmbus_send16(pmdev, pmdev->pages[index].vout_margin_low);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_TRANSITION_RATE: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_transition_rate);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_DROOP: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_droop);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_SCALE_LOOP: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_scale_loop);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_SCALE_MONITOR: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_scale_monitor);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_MIN: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].vout_min);
} else {
goto passthough;
}
break;
/* TODO: implement coefficients support */
case PMBUS_POUT_MAX: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_POUT) {
pmbus_send16(pmdev, pmdev->pages[index].pout_max);
} else {
goto passthough;
}
break;
case PMBUS_VIN_ON: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_on);
} else {
goto passthough;
}
break;
case PMBUS_VIN_OFF: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_off);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_CAL_GAIN: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT_GAIN) {
pmbus_send16(pmdev, pmdev->pages[index].iout_cal_gain);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_OV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_ov_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_OV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send8(pmdev, pmdev->pages[index].vout_ov_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_OV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_ov_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_UV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_uv_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_UV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].vout_uv_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_VOUT_UV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send8(pmdev, pmdev->pages[index].vout_uv_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_OC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send16(pmdev, pmdev->pages[index].iout_oc_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_OC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send8(pmdev, pmdev->pages[index].iout_oc_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_OC_LV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send16(pmdev, pmdev->pages[index].iout_oc_lv_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_OC_LV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send8(pmdev, pmdev->pages[index].iout_oc_lv_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_OC_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send16(pmdev, pmdev->pages[index].iout_oc_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_UC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send16(pmdev, pmdev->pages[index].iout_uc_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_IOUT_UC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send8(pmdev, pmdev->pages[index].iout_uc_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_OT_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send16(pmdev, pmdev->pages[index].ot_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_OT_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send8(pmdev, pmdev->pages[index].ot_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_OT_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send16(pmdev, pmdev->pages[index].ot_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_UT_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send16(pmdev, pmdev->pages[index].ut_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_UT_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send16(pmdev, pmdev->pages[index].ut_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_UT_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send8(pmdev, pmdev->pages[index].ut_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_VIN_OV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_ov_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_VIN_OV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send8(pmdev, pmdev->pages[index].vin_ov_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_VIN_OV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_ov_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_VIN_UV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_uv_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_VIN_UV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].vin_uv_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_VIN_UV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send8(pmdev, pmdev->pages[index].vin_uv_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_IIN_OC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmbus_send16(pmdev, pmdev->pages[index].iin_oc_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_IIN_OC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmbus_send8(pmdev, pmdev->pages[index].iin_oc_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_IIN_OC_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmbus_send16(pmdev, pmdev->pages[index].iin_oc_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_POUT_OP_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_POUT) {
pmbus_send16(pmdev, pmdev->pages[index].pout_op_fault_limit);
} else {
goto passthough;
}
break;
case PMBUS_POUT_OP_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_POUT) {
pmbus_send8(pmdev, pmdev->pages[index].pout_op_fault_response);
} else {
goto passthough;
}
break;
case PMBUS_POUT_OP_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_POUT) {
pmbus_send16(pmdev, pmdev->pages[index].pout_op_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_PIN_OP_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_PIN) {
pmbus_send16(pmdev, pmdev->pages[index].pin_op_warn_limit);
} else {
goto passthough;
}
break;
case PMBUS_STATUS_BYTE: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].status_word & 0xFF);
break;
case PMBUS_STATUS_WORD: /* R/W word */
pmbus_send16(pmdev, pmdev->pages[index].status_word);
break;
case PMBUS_STATUS_VOUT: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send8(pmdev, pmdev->pages[index].status_vout);
} else {
goto passthough;
}
break;
case PMBUS_STATUS_IOUT: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send8(pmdev, pmdev->pages[index].status_iout);
} else {
goto passthough;
}
break;
case PMBUS_STATUS_INPUT: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VIN ||
pmdev->pages[index].page_flags & PB_HAS_IIN ||
pmdev->pages[index].page_flags & PB_HAS_PIN) {
pmbus_send8(pmdev, pmdev->pages[index].status_input);
} else {
goto passthough;
}
break;
case PMBUS_STATUS_TEMPERATURE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send8(pmdev, pmdev->pages[index].status_temperature);
} else {
goto passthough;
}
break;
case PMBUS_STATUS_CML: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].status_cml);
break;
case PMBUS_STATUS_OTHER: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].status_other);
break;
case PMBUS_STATUS_MFR_SPECIFIC: /* R/W byte */
pmbus_send8(pmdev, pmdev->pages[index].status_mfr_specific);
break;
case PMBUS_READ_EIN: /* Read-Only block 5 bytes */
if (pmdev->pages[index].page_flags & PB_HAS_EIN) {
pmbus_send(pmdev, pmdev->pages[index].read_ein, 5);
} else {
goto passthough;
}
break;
case PMBUS_READ_EOUT: /* Read-Only block 5 bytes */
if (pmdev->pages[index].page_flags & PB_HAS_EOUT) {
pmbus_send(pmdev, pmdev->pages[index].read_eout, 5);
} else {
goto passthough;
}
break;
case PMBUS_READ_VIN: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmbus_send16(pmdev, pmdev->pages[index].read_vin);
} else {
goto passthough;
}
break;
case PMBUS_READ_IIN: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmbus_send16(pmdev, pmdev->pages[index].read_iin);
} else {
goto passthough;
}
break;
case PMBUS_READ_VOUT: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmbus_send16(pmdev, pmdev->pages[index].read_vout);
} else {
goto passthough;
}
break;
case PMBUS_READ_IOUT: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmbus_send16(pmdev, pmdev->pages[index].read_iout);
} else {
goto passthough;
}
break;
case PMBUS_READ_TEMPERATURE_1: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmbus_send16(pmdev, pmdev->pages[index].read_temperature_1);
} else {
goto passthough;
}
break;
case PMBUS_READ_TEMPERATURE_2: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMP2) {
pmbus_send16(pmdev, pmdev->pages[index].read_temperature_2);
} else {
goto passthough;
}
break;
case PMBUS_READ_TEMPERATURE_3: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMP3) {
pmbus_send16(pmdev, pmdev->pages[index].read_temperature_3);
} else {
goto passthough;
}
break;
case PMBUS_READ_POUT: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_POUT) {
pmbus_send16(pmdev, pmdev->pages[index].read_pout);
} else {
goto passthough;
}
break;
case PMBUS_READ_PIN: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_PIN) {
pmbus_send16(pmdev, pmdev->pages[index].read_pin);
} else {
goto passthough;
}
break;
case PMBUS_REVISION: /* Read-Only byte */
pmbus_send8(pmdev, pmdev->pages[index].revision);
break;
case PMBUS_MFR_ID: /* R/W block */
if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) {
pmbus_send_string(pmdev, pmdev->pages[index].mfr_id);
} else {
goto passthough;
}
break;
case PMBUS_MFR_MODEL: /* R/W block */
if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) {
pmbus_send_string(pmdev, pmdev->pages[index].mfr_model);
} else {
goto passthough;
}
break;
case PMBUS_MFR_REVISION: /* R/W block */
if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) {
pmbus_send_string(pmdev, pmdev->pages[index].mfr_revision);
} else {
goto passthough;
}
break;
case PMBUS_MFR_LOCATION: /* R/W block */
if (pmdev->pages[index].page_flags & PB_HAS_MFR_INFO) {
pmbus_send_string(pmdev, pmdev->pages[index].mfr_location);
} else {
goto passthough;
}
break;
case PMBUS_MFR_VIN_MIN: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_vin_min);
} else {
goto passthough;
}
break;
case PMBUS_MFR_VIN_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_vin_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_IIN_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_iin_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_PIN_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_PIN_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_pin_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_VOUT_MIN: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_vout_min);
} else {
goto passthough;
}
break;
case PMBUS_MFR_VOUT_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_vout_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_IOUT_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_iout_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_POUT_MAX: /* Read-Only word */
if (pmdev->pages[index].page_flags & PB_HAS_POUT_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_pout_max);
} else {
goto passthough;
}
break;
case PMBUS_MFR_MAX_TEMP_1: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_1);
} else {
goto passthough;
}
break;
case PMBUS_MFR_MAX_TEMP_2: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_2);
} else {
goto passthough;
}
break;
case PMBUS_MFR_MAX_TEMP_3: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMP_RATING) {
pmbus_send16(pmdev, pmdev->pages[index].mfr_max_temp_3);
} else {
goto passthough;
}
break;
case PMBUS_IDLE_STATE:
pmbus_send8(pmdev, PMBUS_ERR_BYTE);
break;
case PMBUS_CLEAR_FAULTS: /* Send Byte */
case PMBUS_PAGE_PLUS_WRITE: /* Block Write-only */
case PMBUS_STORE_DEFAULT_ALL: /* Send Byte */
case PMBUS_RESTORE_DEFAULT_ALL: /* Send Byte */
case PMBUS_STORE_DEFAULT_CODE: /* Write-only Byte */
case PMBUS_RESTORE_DEFAULT_CODE: /* Write-only Byte */
case PMBUS_STORE_USER_ALL: /* Send Byte */
case PMBUS_RESTORE_USER_ALL: /* Send Byte */
case PMBUS_STORE_USER_CODE: /* Write-only Byte */
case PMBUS_RESTORE_USER_CODE: /* Write-only Byte */
case PMBUS_QUERY: /* Write-Only */
qemu_log_mask(LOG_GUEST_ERROR,
"%s: reading from write only register 0x%02x\n",
__func__, pmdev->code);
break;
passthough:
default:
/* Pass through read request if not handled */
if (pmdc->receive_byte) {
ret = pmdc->receive_byte(pmdev);
}
break;
}
if (pmdev->out_buf_len != 0) {
ret = pmbus_out_buf_pop(pmdev);
return ret;
}
return ret;
}
/*
* PMBus clear faults command applies to all status registers, existing faults
* should separately get re-asserted.
*/
static void pmbus_clear_faults(PMBusDevice *pmdev)
{
for (uint8_t i = 0; i < pmdev->num_pages; i++) {
pmdev->pages[i].status_word = 0;
pmdev->pages[i].status_vout = 0;
pmdev->pages[i].status_iout = 0;
pmdev->pages[i].status_input = 0;
pmdev->pages[i].status_temperature = 0;
pmdev->pages[i].status_cml = 0;
pmdev->pages[i].status_other = 0;
pmdev->pages[i].status_mfr_specific = 0;
pmdev->pages[i].status_fans_1_2 = 0;
pmdev->pages[i].status_fans_3_4 = 0;
}
}
/*
* PMBus operation is used to turn On and Off PSUs
* Therefore, default value for the Operation should be PB_OP_ON or 0x80
*/
static void pmbus_operation(PMBusDevice *pmdev)
{
uint8_t index = pmdev->page;
if ((pmdev->pages[index].operation & PB_OP_ON) == 0) {
pmdev->pages[index].read_vout = 0;
pmdev->pages[index].read_iout = 0;
pmdev->pages[index].read_pout = 0;
return;
}
if (pmdev->pages[index].operation & (PB_OP_ON | PB_OP_MARGIN_HIGH)) {
pmdev->pages[index].read_vout = pmdev->pages[index].vout_margin_high;
}
if (pmdev->pages[index].operation & (PB_OP_ON | PB_OP_MARGIN_LOW)) {
pmdev->pages[index].read_vout = pmdev->pages[index].vout_margin_low;
}
pmbus_check_limits(pmdev);
}
static int pmbus_write_data(SMBusDevice *smd, uint8_t *buf, uint8_t len)
{
PMBusDevice *pmdev = PMBUS_DEVICE(smd);
PMBusDeviceClass *pmdc = PMBUS_DEVICE_GET_CLASS(pmdev);
int ret = 0;
uint8_t index;
if (len == 0) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: writing empty data\n", __func__);
return PMBUS_ERR_BYTE;
}
if (!pmdev->pages) { /* allocate memory for pages on first use */
pmbus_pages_alloc(pmdev);
}
pmdev->in_buf_len = len;
pmdev->in_buf = buf;
pmdev->code = buf[0]; /* PMBus command code */
if (len == 1) { /* Single length writes are command codes only */
return 0;
}
if (pmdev->code == PMBUS_PAGE) {
pmdev->page = pmbus_receive8(pmdev);
return 0;
}
/* loop through all the pages when 0xFF is received */
if (pmdev->page == PB_ALL_PAGES) {
for (int i = 0; i < pmdev->num_pages; i++) {
pmdev->page = i;
pmbus_write_data(smd, buf, len);
}
pmdev->page = PB_ALL_PAGES;
return 0;
}
if (pmdev->page > pmdev->num_pages - 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: page %u is out of range\n",
__func__, pmdev->page);
pmdev->page = 0; /* undefined behaviour - reset to page 0 */
pmbus_cml_error(pmdev);
return PMBUS_ERR_BYTE;
}
index = pmdev->page;
switch (pmdev->code) {
case PMBUS_OPERATION: /* R/W byte */
pmdev->pages[index].operation = pmbus_receive8(pmdev);
pmbus_operation(pmdev);
break;
case PMBUS_ON_OFF_CONFIG: /* R/W byte */
pmdev->pages[index].on_off_config = pmbus_receive8(pmdev);
break;
case PMBUS_CLEAR_FAULTS: /* Send Byte */
pmbus_clear_faults(pmdev);
break;
case PMBUS_PHASE: /* R/W byte */
pmdev->pages[index].phase = pmbus_receive8(pmdev);
break;
case PMBUS_PAGE_PLUS_WRITE: /* Block Write-only */
case PMBUS_WRITE_PROTECT: /* R/W byte */
pmdev->pages[index].write_protect = pmbus_receive8(pmdev);
break;
case PMBUS_VOUT_MODE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MODE) {
pmdev->pages[index].vout_mode = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_COMMAND: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_command = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_TRIM: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_trim = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_CAL_OFFSET: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_cal_offset = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_MAX: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_max = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_MARGIN_HIGH: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) {
pmdev->pages[index].vout_margin_high = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_MARGIN_LOW: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_MARGIN) {
pmdev->pages[index].vout_margin_low = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_TRANSITION_RATE: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_transition_rate = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_DROOP: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_droop = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_SCALE_LOOP: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_scale_loop = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_SCALE_MONITOR: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_scale_monitor = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_MIN: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT_RATING) {
pmdev->pages[index].vout_min = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_POUT_MAX: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].pout_max = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_ON: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_on = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_OFF: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_off = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_CAL_GAIN: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT_GAIN) {
pmdev->pages[index].iout_cal_gain = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_OV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_ov_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_OV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_ov_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_OV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_ov_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_UV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_uv_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_UV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_uv_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VOUT_UV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].vout_uv_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_OC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_oc_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_OC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_oc_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_OC_LV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_oc_lv_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_OC_LV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_oc_lv_fault_response
= pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_OC_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_oc_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_UC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_uc_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IOUT_UC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].iout_uc_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_OT_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ot_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_OT_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ot_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_OT_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ot_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_UT_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ut_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_UT_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ut_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_UT_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].ut_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_OV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_ov_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_OV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_ov_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_OV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_ov_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_UV_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_uv_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_UV_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_uv_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_VIN_UV_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VIN) {
pmdev->pages[index].vin_uv_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IIN_OC_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmdev->pages[index].iin_oc_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IIN_OC_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmdev->pages[index].iin_oc_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_IIN_OC_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_IIN) {
pmdev->pages[index].iin_oc_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_POUT_OP_FAULT_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].pout_op_fault_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_POUT_OP_FAULT_RESPONSE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].pout_op_fault_response = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_POUT_OP_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].pout_op_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_PIN_OP_WARN_LIMIT: /* R/W word */
if (pmdev->pages[index].page_flags & PB_HAS_PIN) {
pmdev->pages[index].pin_op_warn_limit = pmbus_receive16(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_STATUS_BYTE: /* R/W byte */
pmdev->pages[index].status_word = pmbus_receive8(pmdev);
break;
case PMBUS_STATUS_WORD: /* R/W word */
pmdev->pages[index].status_word = pmbus_receive16(pmdev);
break;
case PMBUS_STATUS_VOUT: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_VOUT) {
pmdev->pages[index].status_vout = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_STATUS_IOUT: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_IOUT) {
pmdev->pages[index].status_iout = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_STATUS_INPUT: /* R/W byte */
pmdev->pages[index].status_input = pmbus_receive8(pmdev);
break;
case PMBUS_STATUS_TEMPERATURE: /* R/W byte */
if (pmdev->pages[index].page_flags & PB_HAS_TEMPERATURE) {
pmdev->pages[index].status_temperature = pmbus_receive8(pmdev);
} else {
goto passthrough;
}
break;
case PMBUS_STATUS_CML: /* R/W byte */
pmdev->pages[index].status_cml = pmbus_receive8(pmdev);
break;
case PMBUS_STATUS_OTHER: /* R/W byte */
pmdev->pages[index].status_other = pmbus_receive8(pmdev);
break;
case PMBUS_STATUS_MFR_SPECIFIC: /* R/W byte */
pmdev->pages[index].status_mfr_specific = pmbus_receive8(pmdev);
break;
case PMBUS_PAGE_PLUS_READ: /* Block Read-only */
case PMBUS_CAPABILITY: /* Read-Only byte */
case PMBUS_COEFFICIENTS: /* Read-only block 5 bytes */
case PMBUS_READ_EIN: /* Read-Only block 5 bytes */
case PMBUS_READ_EOUT: /* Read-Only block 5 bytes */
case PMBUS_READ_VIN: /* Read-Only word */
case PMBUS_READ_IIN: /* Read-Only word */
case PMBUS_READ_VCAP: /* Read-Only word */
case PMBUS_READ_VOUT: /* Read-Only word */
case PMBUS_READ_IOUT: /* Read-Only word */
case PMBUS_READ_TEMPERATURE_1: /* Read-Only word */
case PMBUS_READ_TEMPERATURE_2: /* Read-Only word */
case PMBUS_READ_TEMPERATURE_3: /* Read-Only word */
case PMBUS_READ_FAN_SPEED_1: /* Read-Only word */
case PMBUS_READ_FAN_SPEED_2: /* Read-Only word */
case PMBUS_READ_FAN_SPEED_3: /* Read-Only word */
case PMBUS_READ_FAN_SPEED_4: /* Read-Only word */
case PMBUS_READ_DUTY_CYCLE: /* Read-Only word */
case PMBUS_READ_FREQUENCY: /* Read-Only word */
case PMBUS_READ_POUT: /* Read-Only word */
case PMBUS_READ_PIN: /* Read-Only word */
case PMBUS_REVISION: /* Read-Only byte */
case PMBUS_APP_PROFILE_SUPPORT: /* Read-Only block-read */
case PMBUS_MFR_VIN_MIN: /* Read-Only word */
case PMBUS_MFR_VIN_MAX: /* Read-Only word */
case PMBUS_MFR_IIN_MAX: /* Read-Only word */
case PMBUS_MFR_PIN_MAX: /* Read-Only word */
case PMBUS_MFR_VOUT_MIN: /* Read-Only word */
case PMBUS_MFR_VOUT_MAX: /* Read-Only word */
case PMBUS_MFR_IOUT_MAX: /* Read-Only word */
case PMBUS_MFR_POUT_MAX: /* Read-Only word */
case PMBUS_MFR_TAMBIENT_MAX: /* Read-Only word */
case PMBUS_MFR_TAMBIENT_MIN: /* Read-Only word */
case PMBUS_MFR_EFFICIENCY_LL: /* Read-Only block 14 bytes */
case PMBUS_MFR_EFFICIENCY_HL: /* Read-Only block 14 bytes */
case PMBUS_MFR_PIN_ACCURACY: /* Read-Only byte */
case PMBUS_IC_DEVICE_ID: /* Read-Only block-read */
case PMBUS_IC_DEVICE_REV: /* Read-Only block-read */
qemu_log_mask(LOG_GUEST_ERROR,
"%s: writing to read-only register 0x%02x\n",
__func__, pmdev->code);
break;
passthrough:
/* Unimplimented registers get passed to the device */
default:
if (pmdc->write_data) {
ret = pmdc->write_data(pmdev, buf, len);
}
break;
}
pmbus_check_limits(pmdev);
pmdev->in_buf_len = 0;
return ret;
}
int pmbus_page_config(PMBusDevice *pmdev, uint8_t index, uint64_t flags)
{
if (!pmdev->pages) { /* allocate memory for pages on first use */
pmbus_pages_alloc(pmdev);
}
/* The 0xFF page is special for commands applying to all pages */
if (index == PB_ALL_PAGES) {
for (int i = 0; i < pmdev->num_pages; i++) {
pmdev->pages[i].page_flags = flags;
}
return 0;
}
if (index > pmdev->num_pages - 1) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: index %u is out of range\n",
__func__, index);
return -1;
}
pmdev->pages[index].page_flags = flags;
return 0;
}
/* TODO: include pmbus page info in vmstate */
const VMStateDescription vmstate_pmbus_device = {
.name = TYPE_PMBUS_DEVICE,
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_SMBUS_DEVICE(smb, PMBusDevice),
VMSTATE_UINT8(num_pages, PMBusDevice),
VMSTATE_UINT8(code, PMBusDevice),
VMSTATE_UINT8(page, PMBusDevice),
VMSTATE_UINT8(capability, PMBusDevice),
VMSTATE_END_OF_LIST()
}
};
static void pmbus_device_finalize(Object *obj)
{
PMBusDevice *pmdev = PMBUS_DEVICE(obj);
g_free(pmdev->pages);
}
static void pmbus_device_class_init(ObjectClass *klass, void *data)
{
SMBusDeviceClass *k = SMBUS_DEVICE_CLASS(klass);
k->quick_cmd = pmbus_quick_cmd;
k->write_data = pmbus_write_data;
k->receive_byte = pmbus_receive_byte;
}
static const TypeInfo pmbus_device_type_info = {
.name = TYPE_PMBUS_DEVICE,
.parent = TYPE_SMBUS_DEVICE,
.instance_size = sizeof(PMBusDevice),
.instance_finalize = pmbus_device_finalize,
.abstract = true,
.class_size = sizeof(PMBusDeviceClass),
.class_init = pmbus_device_class_init,
};
static void pmbus_device_register_types(void)
{
type_register_static(&pmbus_device_type_info);
}
type_init(pmbus_device_register_types)
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